About: Turbulent Boundary Layer generated Over Two Urban Roughnesses

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	As a basis for PIV measurement, turbulent characteristics of a flow were investigated by LDA over two different types of urban roughness in wind-tunnel. The roughness consists from long series of street canyons with unit aspect ratio. Different shapes of roof - flat and pitched - provide a different internal boundary layer above canyons. The latter one, generated by pitched roofs, is significantly more turbulent and thus slower then above flat roofs. Momentum flux and corresponding transport exhibits the largest deviation specially at the roof level. Ventilation in the streets is therefore distinct from each other. Quadrant analysis was applied for vertical profiles and cross-sectional areas in canyons in order to detect a domination of sweep or ejection events and to find a linkage to the third moment of velocity for both cases. The overall goal of the project is to find any of coherent structure produced by the roof edge as a low momentum region or an ejection formed by hairpin. As a basis for PIV measurement, turbulent characteristics of a flow were investigated by LDA over two different types of urban roughness in wind-tunnel. The roughness consists from long series of street canyons with unit aspect ratio. Different shapes of roof - flat and pitched - provide a different internal boundary layer above canyons. The latter one, generated by pitched roofs, is significantly more turbulent and thus slower then above flat roofs. Momentum flux and corresponding transport exhibits the largest deviation specially at the roof level. Ventilation in the streets is therefore distinct from each other. Quadrant analysis was applied for vertical profiles and cross-sectional areas in canyons in order to detect a domination of sweep or ejection events and to find a linkage to the third moment of velocity for both cases. The overall goal of the project is to find any of coherent structure produced by the roof edge as a low momentum region or an ejection formed by hairpin. (en)
Title	Turbulent Boundary Layer generated Over Two Urban Roughnesses Turbulent Boundary Layer generated Over Two Urban Roughnesses (en)
skos:prefLabel	Turbulent Boundary Layer generated Over Two Urban Roughnesses Turbulent Boundary Layer generated Over Two Urban Roughnesses (en)
skos:notation	RIV/61388998:_____/09:00333098!RIV10-MSM-61388998
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(OC 113), Z(AV0Z20760514)
http://linked.open...vai/riv/dodaniDat	2010
http://linked.open...aciTvurceVysledku	Kellnerová, Radka Jaňour, Zbyněk
http://linked.open.../riv/druhVysledku	D - Článek ve sborníku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav termomechaniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	347085
http://linked.open...ai/riv/idVysledku	RIV/61388998:_____/09:00333098
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	street canyon; flat and pitched roof; quadrant analysis; wavelet analysis (en)
http://linked.open.../riv/klicoveSlovo	quadrant analysis street canyon wavelet analysis flat and pitched roof
http://linked.open...ontrolniKodProRIV	[AD8A505517C2]
http://linked.open...v/mistoKonaniAkce	Liberec
http://linked.open...i/riv/mistoVydani	Liberec
http://linked.open...i/riv/nazevZdroje	Experimental Fluid Mechanics 2009
http://linked.open...in/vavai/riv/obor	DG
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	http://linked.opendata.cz/resource/domain/vavai/projekt/OC%20113
http://linked.open...UplatneniVysledku	2009
http://linked.open...iv/tvurceVysledku	Jaňour, Zbyněk Kellnerová, Radka
http://linked.open...vavai/riv/typAkce	EUR - Evropská
http://linked.open.../riv/zahajeniAkce	2009-11-25 (xsd:date)
http://linked.open...n/vavai/riv/zamer	Complex dynamical systems in thermodynamics, fluid and solid mechanics
number of pages	10 (xsd:int)
http://purl.org/ne...btex#hasPublisher	Technická univerzita v Liberci
https://schema.org/isbn	978-80-7372-538-9

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